The Mercedes W176 Rain/Light Sensor Housing Cover is an original component mounted on the rearview mirror, responsible for the stable and aesthetic mounting of the rain and light sensor. Maintaining the correct sensor position directly impacts the proper operation of the automatic lights and wipers, and therefore driving comfort and safety.
Specifications and technical data
- SKU: A1768211136-1
- Mark: Mercedes
- Condition: Used
- OEM Part Number: A1768211136
- Substitutable numbers: A1768211136, A 176 821 11 36
- Location on the vehicle: Rear
- Category: Rear View Mirrors
Purpose and function of the sensor cover
The cover shown is a built-in element within the rearview mirror, designed to accommodate the rain and light sensor in W176 series models. Its purpose is to:
- stable holding of the sensor in the correct working position,
- protection of the connector and sensor body against accidental mechanical damage from the vehicle interior,
- aesthetic finishing of the mirror area, without visible wires and mounting edges.
A properly selected housing reduces the risk of reading errors, automatic lights flickering or incorrect operation of the wipers in automatic mode.
Construction, fitting and assembly
The rain and light sensor cover was designed as an element dedicated to a specific generation of vehicles, which translates into:
- precise fit with the rear-view mirror and adjacent headliner elements,
- maintaining the factory geometry of the sensor position relative to the glass,
- compatibility with the factory mount – no need to modify the mounts or make adapters.
The location on the vehicle is planned in the rear area of the cabin, in the area of the rear-view mirror, which facilitates service access and possible replacement of the element when working on the sensor or mirror.
Used condition - practical benefits
The item is offered in used condition, representing a reasonable compromise between cost and functionality. When it comes to sensor covers and housings, it's crucial to maintain:
- stability of fastenings – latches and attachment points must ensure a secure hold,
- correct geometry – the lack of deformation affects the correct positioning of the sensor,
- appropriate internal surface – so as not to interfere with the operation of optical elements.
Choosing a used cover allows you to reduce the cost of repairing or assembling a mirror and sensor assembly while maintaining the original vehicle manufacturer's design.
Application in the rearview mirror system
Mercedes W176 Rain Light Sensor Housing Cover is part of a system integrated with the rear-view mirror, in which the following are concentrated in one zone:
- interior mirror,
- rain and light sensor,
- wiring harness and electrical system connectors.
Correctly selected housing:
- organizes the cable routing around the mirror,
- limits the access of dust and dirt to the sensor connector,
- ensures a consistent interior appearance, consistent with the factory finishing standard.
Parts selection and additional information
When selecting a cover for a specific vehicle, it's important to ensure compatibility with the mirror type and trim level used to maintain the full functionality of automatic lights and wipers. When in doubt, it's helpful to compare the shape and mounting method with the currently installed component.
If you need other rear view mirrors for Mercedes or related items, check out our dedicated category: rear view mirrors for Mercedes .
More practical tips on how to make an informed choice of used modules and sensors, including the rules for selecting them based on manufacturer markings and compatibility issues, can be found in the guide: used car electronics – second-hand ECU modules and sensors .
